Abstract
Data on Pre-Permian rocks are reported only from the P-1 well, which was bottomed in Caledonian basement. The geology of this formation in the western part of the Danish sector is, therefore, poorly known. According to the age determinations performed and reviewed by Frost et al. (1981), the North GermanPolish Caledonides extend under most of the North Sea and join the Scottish-Norwegian Caledonides, whereas most of the Ringkøbing-Fyn High is underlain by Precambrian basement.
Highlights
As a rule, the lithology of each unit or formation is described, as interpreted from various sample descriptions and from wire line logs
The formation descriptions are accompanied by palinspastic profiles and generalised formation maps comprising thickness and distribution
Legends for signature on maps, palinspastic profiles, and well sections are given in fig. 3
Summary
The thickness of the Quaternary cover is up to 600 m in the Central Graben area. All formations recorded by drilling in the Danish Central Graben area are listed and described in the present chapter. Data on Pre-Permian rocks are reported only from the P-1 well, which was bottomed in Caledonian basement The geology of this formation in the western part of the Danish sector is, poorly known. The P-1 well, situated on the western extension of the Dogger High, was bottomed in a sequence of greenschists, believed to be meta-tuffs between 11259-11464' b.KB In some of these beds, phenocrystal relics of clinopyroxene, titanite and apatite may be abundant, whereas green biotite (?primary), zircon and brown amphibole are scarce. Thin beds are intercalated with the meta-tuff They are rich in albite-oligoclase, forming fragmental to more or less rounded relics, together with scattered grains of the Central Graben - Danish section
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